FR2707404B1 - Focus detection device. - Google Patents

Focus detection device.

Info

Publication number
FR2707404B1
FR2707404B1 FR9408498A FR9408498A FR2707404B1 FR 2707404 B1 FR2707404 B1 FR 2707404B1 FR 9408498 A FR9408498 A FR 9408498A FR 9408498 A FR9408498 A FR 9408498A FR 2707404 B1 FR2707404 B1 FR 2707404B1
Authority
FR
France
Prior art keywords
detection device
focus detection
focus
detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
FR9408498A
Other languages
French (fr)
Other versions
FR2707404A1 (en
Inventor
Takayuki Sensui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of FR2707404A1 publication Critical patent/FR2707404A1/en
Application granted granted Critical
Publication of FR2707404B1 publication Critical patent/FR2707404B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/34—Systems for automatic generation of focusing signals using different areas in a pupil plane
    • G02B7/346—Systems for automatic generation of focusing signals using different areas in a pupil plane using horizontal and vertical areas in the pupil plane, i.e. wide area autofocusing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
FR9408498A 1993-07-08 1994-07-08 Focus detection device. Expired - Fee Related FR2707404B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16908293 1993-07-08

Publications (2)

Publication Number Publication Date
FR2707404A1 FR2707404A1 (en) 1995-01-13
FR2707404B1 true FR2707404B1 (en) 1996-12-27

Family

ID=15879994

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9408498A Expired - Fee Related FR2707404B1 (en) 1993-07-08 1994-07-08 Focus detection device.

Country Status (4)

Country Link
US (2) US5530236A (en)
DE (1) DE4424131B4 (en)
FR (1) FR2707404B1 (en)
GB (1) GB2279843B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2279843B (en) * 1993-07-08 1998-04-01 Asahi Optical Co Ltd A focus detecting apparatus
JPH0980300A (en) * 1995-09-11 1997-03-28 Asahi Optical Co Ltd Optical unit for automatically detecting focus
US5789735A (en) * 1995-10-16 1998-08-04 Raytheon Company Optical system for reformatting a line image
JPH09265040A (en) * 1996-03-28 1997-10-07 Minolta Co Ltd Focus detector
US5943514A (en) * 1996-07-19 1999-08-24 Asahi Kogaku Kogyo Kabushiki Kaisha Focusing system
US6128444A (en) * 1998-07-13 2000-10-03 Asahi Kogaku Kogyo Kabushiki Kaisha Multipoint focus detecting apparatus
JP3283235B2 (en) 1998-09-25 2002-05-20 旭光学工業株式会社 Multi-point focus detection device
JP2000121927A (en) 1998-10-09 2000-04-28 Asahi Optical Co Ltd Focus detector
JP2001124983A (en) 1999-10-25 2001-05-11 Asahi Optical Co Ltd Multifocus detecting device
JP2001343580A (en) 2000-05-31 2001-12-14 Asahi Optical Co Ltd Focus detector
KR100853186B1 (en) * 2006-12-05 2008-08-20 한국전자통신연구원 Multi-aperture photodetector and circuit for detecting optical signal comprising the same photodetector
JP5625876B2 (en) * 2010-01-08 2014-11-19 リコーイメージング株式会社 Focus detection optical system
JP7089719B2 (en) * 2017-02-07 2022-06-23 ナノフォトン株式会社 Spectroscopic microscope and spectroscopic observation method

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636627A (en) * 1983-01-17 1987-01-13 Canon Kabushiki Kaisha Focus detecting apparatus
JP2770301B2 (en) * 1987-05-08 1998-07-02 ミノルタ株式会社 Optical device for focus detection
US5229807A (en) * 1987-05-08 1993-07-20 Minolta Camera Kabushiki Kaisha Focus detecting device
US4903065A (en) * 1987-05-15 1990-02-20 Minolta Camera Kabushiki Kaisha Focus condition detecting device
JPH07117645B2 (en) * 1987-12-14 1995-12-18 キヤノン株式会社 Focus detection device
US5017005A (en) * 1988-03-18 1991-05-21 Asahi Kogaku Kogyo Kabushiki Kaisha Focal point detecting optical apparatus
JP2770316B2 (en) * 1988-05-13 1998-07-02 ミノルタ株式会社 Automatic focus detection device
US5140359A (en) * 1988-05-16 1992-08-18 Canon Kabushiki Kaisha Multi-point distance measuring apparatus
US5155518A (en) * 1988-08-24 1992-10-13 Nikon Corporation Focus detecting apparatus
JPH0258012A (en) * 1988-08-24 1990-02-27 Nikon Corp Focus detector
JP3118610B2 (en) * 1990-09-18 2000-12-18 株式会社リコー Focus state detector
EP0479550B1 (en) * 1990-10-01 1998-01-14 Nikon Corporation Focus detection apparatus
JP3108697B2 (en) * 1991-04-25 2000-11-13 旭光学工業株式会社 Focus detection device
FR2676837B1 (en) * 1991-05-20 1995-02-17 Asahi Optical Co Ltd FOCUSING DETECTION APPARATUS.
US5206498A (en) * 1991-06-07 1993-04-27 Asahi Kogaku Kogyo Kabushiki Kaisha Focus detecting apparatus having variable power condenser lens
JP3199774B2 (en) * 1991-06-26 2001-08-20 旭光学工業株式会社 Focus detection device
JP3213984B2 (en) * 1991-09-10 2001-10-02 株式会社ニコン Focus detection device
JPH05264894A (en) * 1992-01-22 1993-10-15 Nikon Corp Focus detecting device
US5420438A (en) * 1992-10-29 1995-05-30 Asahi Kogaku Kogyo Kabushiki Kaisha Focus detecting apparatus including movement of detecting zones
GB2279843B (en) * 1993-07-08 1998-04-01 Asahi Optical Co Ltd A focus detecting apparatus

Also Published As

Publication number Publication date
US5530236A (en) 1996-06-25
DE4424131B4 (en) 2004-08-26
GB9413839D0 (en) 1994-08-24
GB2279843B (en) 1998-04-01
GB2279843A (en) 1995-01-11
DE4424131A1 (en) 1995-01-12
US5646393A (en) 1997-07-08
FR2707404A1 (en) 1995-01-13

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Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20090331